MSDC_PREPARE_FLAG
if (!(data->host_cookie & MSDC_PREPARE_FLAG)) {
data->host_cookie |= MSDC_PREPARE_FLAG;
return data->host_cookie & MSDC_PREPARE_FLAG;
if (data->host_cookie & MSDC_PREPARE_FLAG) {
data->host_cookie &= ~MSDC_PREPARE_FLAG;